It has a half-life of approximately three years at which time it stops decaying.

它生命的一半是三年,在三年的时候，它就停止衰亡。

麻省理工公开课 - 固态化学导论课程节选

And isn't that clear already from their colors, the material that they're made of Gold and silver, these colors marked them as fashioned, precious objects, inorganic, and in all these ways beyond time and nature, growth or decay.

从它们的颜色上很容易知道，制作它们的材料,金银说明它们是,特制的珍贵的物件，非自然生长的，这些都是超越时间自然,不会生长或衰亡。

耶鲁公开课 - 现代诗歌课程节选

You can tell if a pot comes from Athens or it comes from Pylos, or-- not Pylos it was probably out of business-- Thebes or someplace else because they have their local characteristics which are perfectly obvious.

你可以从一个罐子辨认出它是来自雅典,或者皮洛斯,或者--,不会是皮洛斯,它已经衰亡了--,底比斯或是一些其他的地方,因为它们都留有当地的风格,这些风格很明显地表现了出来

耶鲁公开课 - 古希腊历史简介课程节选

I have to believe that whoever came up with that theory for the first time was aided in coming to it by thinking about the end of the Roman Empire, when something precisely like that did happen.

我想任何人第一次接触该理论,都会自动联想到罗马帝国的衰亡,进而支持该理论,因为类似的事情确实曾经发生过

耶鲁公开课 - 古希腊历史简介课程节选